Shell script to comment and uncomment a line in file

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP











up vote
1
down vote

favorite












I have a file where listed all server for exemple lserver :



$ cat lserver
A1
A2
A3


I want to create a shell script to comment any server from lserver
exemple :



$ stopm.sh A2
$ cat lserver 
A1
#A2
A3


and uncomment a server from lserver :
exemple 



$ startm.sh A2
$ cat lserver
A1
A2
A3


Any suggestion?




bash shell-script shell




share|improve this question





















  • Welcome to U&L, we are not a script writing service, please, edit your question with what you have tried so far.
    – Archemar
    Jul 5 at 11:13






  • 1




    Note don't give script names extensions. This is a filthy habit that has come from MS-dos. It leaks implementation detail. That is it tells the use what language it is written in. This will make it harder if you need to re-write the program, in another language, because all scripts/programs that use it will need to be edited.
    – ctrl-alt-delor
    Jul 5 at 11:18














up vote
1
down vote

favorite












I have a file where listed all server for exemple lserver :



$ cat lserver
A1
A2
A3


I want to create a shell script to comment any server from lserver
exemple :



$ stopm.sh A2
$ cat lserver 
A1
#A2
A3


and uncomment a server from lserver :
exemple 



$ startm.sh A2
$ cat lserver
A1
A2
A3


Any suggestion?




bash shell-script shell




share|improve this question





















  • Welcome to U&L, we are not a script writing service, please, edit your question with what you have tried so far.
    – Archemar
    Jul 5 at 11:13






  • 1




    Note don't give script names extensions. This is a filthy habit that has come from MS-dos. It leaks implementation detail. That is it tells the use what language it is written in. This will make it harder if you need to re-write the program, in another language, because all scripts/programs that use it will need to be edited.
    – ctrl-alt-delor
    Jul 5 at 11:18












up vote
1
down vote

favorite









up vote
1
down vote

favorite











I have a file where listed all server for exemple lserver :



$ cat lserver
A1
A2
A3


I want to create a shell script to comment any server from lserver
exemple :



$ stopm.sh A2
$ cat lserver 
A1
#A2
A3


and uncomment a server from lserver :
exemple 



$ startm.sh A2
$ cat lserver
A1
A2
A3


Any suggestion?




bash shell-script shell




share|improve this question













I have a file where listed all server for exemple lserver :



$ cat lserver
A1
A2
A3


I want to create a shell script to comment any server from lserver
exemple :



$ stopm.sh A2
$ cat lserver 
A1
#A2
A3


and uncomment a server from lserver :
exemple 



$ startm.sh A2
$ cat lserver
A1
A2
A3


Any suggestion?





bash shell-script shell





share|improve this question












share|improve this question




share|improve this question








edited Jul 5 at 11:34
























asked Jul 5 at 10:49









BOUABANE Raed

62




62











  • Welcome to U&L, we are not a script writing service, please, edit your question with what you have tried so far.
    – Archemar
    Jul 5 at 11:13






  • 1




    Note don't give script names extensions. This is a filthy habit that has come from MS-dos. It leaks implementation detail. That is it tells the use what language it is written in. This will make it harder if you need to re-write the program, in another language, because all scripts/programs that use it will need to be edited.
    – ctrl-alt-delor
    Jul 5 at 11:18
















  • Welcome to U&L, we are not a script writing service, please, edit your question with what you have tried so far.
    – Archemar
    Jul 5 at 11:13






  • 1




    Note don't give script names extensions. This is a filthy habit that has come from MS-dos. It leaks implementation detail. That is it tells the use what language it is written in. This will make it harder if you need to re-write the program, in another language, because all scripts/programs that use it will need to be edited.
    – ctrl-alt-delor
    Jul 5 at 11:18















Welcome to U&L, we are not a script writing service, please, edit your question with what you have tried so far.
– Archemar
Jul 5 at 11:13




Welcome to U&L, we are not a script writing service, please, edit your question with what you have tried so far.
– Archemar
Jul 5 at 11:13




1




1




Note don't give script names extensions. This is a filthy habit that has come from MS-dos. It leaks implementation detail. That is it tells the use what language it is written in. This will make it harder if you need to re-write the program, in another language, because all scripts/programs that use it will need to be edited.
– ctrl-alt-delor
Jul 5 at 11:18




Note don't give script names extensions. This is a filthy habit that has come from MS-dos. It leaks implementation detail. That is it tells the use what language it is written in. This will make it harder if you need to re-write the program, in another language, because all scripts/programs that use it will need to be edited.
– ctrl-alt-delor
Jul 5 at 11:18










3 Answers
3






active

oldest

votes

















up vote
2
down vote













To comment:



server=A2; sed -i "/^$server/ c#$server" file.txt



To uncomment:



server=A2; sed -i "/^#$server/ c$server" file.txt






share|improve this answer

















  • 1




    What dose the c do?
    – ctrl-alt-delor
    Jul 5 at 11:38






  • 1




    c option to change a complete line
    – SivaPrasath
    Jul 5 at 11:39

















up vote
0
down vote













(server=A2; sed -ir -e "s/^$server$/#1/")





share|improve this answer



















  • 1




    I would make sure that pattern starts from beginning of line to be sure I will match correct server and won't add another '#' sign there. Same goes to the end of pattern as there should be a difference between A1 and A13, right?
    – Kalavan
    Jul 5 at 11:28

















up vote
0
down vote













#!/bin/bash
server="$1"
case $2 in
start)
 sed -i "s/^#($server)$/1/" lserver.txt
 ;;
stop)
 sed -i "s/^$server$/#&/" lserver.txt
 ;;
esac


Save as server_ctrl, then run chmod u+x server_ctrl.



Usage:



 ./server_ctrl A2 start|stop





share|improve this answer























  • looks odd, is that a GNUism? I think the standard way to refer to the matched string is &. Also, you'll match A11 too when looking for A1.
    – ilkkachu
    Jul 5 at 11:52










  • Might be GNUish, but I saw in many implementations. For me & looks odd When I have 1 to 9 , why not ...
    – RoVo
    Jul 5 at 12:07











Your Answer







StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "106"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);

else
createEditor();

);

function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
convertImagesToLinks: false,
noModals: false,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);



);








 

draft saved


draft discarded


















StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f453585%2fshell-script-to-comment-and-uncomment-a-line-in-file%23new-answer', 'question_page');

);

Post as a guest

















3 Answers
3






active

oldest

votes








3 Answers
3






active

oldest

votes









active

oldest

votes






active

oldest

votes








up vote
2
down vote













To comment:



server=A2; sed -i "/^$server/ c#$server" file.txt



To uncomment:



server=A2; sed -i "/^#$server/ c$server" file.txt






share|improve this answer

















  • 1




    What dose the c do?
    – ctrl-alt-delor
    Jul 5 at 11:38






  • 1




    c option to change a complete line
    – SivaPrasath
    Jul 5 at 11:39














up vote
2
down vote













To comment:



server=A2; sed -i "/^$server/ c#$server" file.txt



To uncomment:



server=A2; sed -i "/^#$server/ c$server" file.txt






share|improve this answer

















  • 1




    What dose the c do?
    – ctrl-alt-delor
    Jul 5 at 11:38






  • 1




    c option to change a complete line
    – SivaPrasath
    Jul 5 at 11:39












up vote
2
down vote










up vote
2
down vote









To comment:



server=A2; sed -i "/^$server/ c#$server" file.txt



To uncomment:



server=A2; sed -i "/^#$server/ c$server" file.txt






share|improve this answer













To comment:



server=A2; sed -i "/^$server/ c#$server" file.txt



To uncomment:



server=A2; sed -i "/^#$server/ c$server" file.txt







share|improve this answer













share|improve this answer



share|improve this answer











answered Jul 5 at 11:35









SivaPrasath

3,69811636




3,69811636







  • 1




    What dose the c do?
    – ctrl-alt-delor
    Jul 5 at 11:38






  • 1




    c option to change a complete line
    – SivaPrasath
    Jul 5 at 11:39












  • 1




    What dose the c do?
    – ctrl-alt-delor
    Jul 5 at 11:38






  • 1




    c option to change a complete line
    – SivaPrasath
    Jul 5 at 11:39







1




1




What dose the c do?
– ctrl-alt-delor
Jul 5 at 11:38




What dose the c do?
– ctrl-alt-delor
Jul 5 at 11:38




1




1




c option to change a complete line
– SivaPrasath
Jul 5 at 11:39




c option to change a complete line
– SivaPrasath
Jul 5 at 11:39












up vote
0
down vote













(server=A2; sed -ir -e "s/^$server$/#1/")





share|improve this answer



















  • 1




    I would make sure that pattern starts from beginning of line to be sure I will match correct server and won't add another '#' sign there. Same goes to the end of pattern as there should be a difference between A1 and A13, right?
    – Kalavan
    Jul 5 at 11:28














up vote
0
down vote













(server=A2; sed -ir -e "s/^$server$/#1/")





share|improve this answer



















  • 1




    I would make sure that pattern starts from beginning of line to be sure I will match correct server and won't add another '#' sign there. Same goes to the end of pattern as there should be a difference between A1 and A13, right?
    – Kalavan
    Jul 5 at 11:28












up vote
0
down vote










up vote
0
down vote









(server=A2; sed -ir -e "s/^$server$/#1/")





share|improve this answer















(server=A2; sed -ir -e "s/^$server$/#1/")






share|improve this answer















share|improve this answer



share|improve this answer








edited Jul 5 at 11:35


























answered Jul 5 at 11:15









ctrl-alt-delor

8,68331947




8,68331947







  • 1




    I would make sure that pattern starts from beginning of line to be sure I will match correct server and won't add another '#' sign there. Same goes to the end of pattern as there should be a difference between A1 and A13, right?
    – Kalavan
    Jul 5 at 11:28












  • 1




    I would make sure that pattern starts from beginning of line to be sure I will match correct server and won't add another '#' sign there. Same goes to the end of pattern as there should be a difference between A1 and A13, right?
    – Kalavan
    Jul 5 at 11:28







1




1




I would make sure that pattern starts from beginning of line to be sure I will match correct server and won't add another '#' sign there. Same goes to the end of pattern as there should be a difference between A1 and A13, right?
– Kalavan
Jul 5 at 11:28




I would make sure that pattern starts from beginning of line to be sure I will match correct server and won't add another '#' sign there. Same goes to the end of pattern as there should be a difference between A1 and A13, right?
– Kalavan
Jul 5 at 11:28










up vote
0
down vote













#!/bin/bash
server="$1"
case $2 in
start)
 sed -i "s/^#($server)$/1/" lserver.txt
 ;;
stop)
 sed -i "s/^$server$/#&/" lserver.txt
 ;;
esac


Save as server_ctrl, then run chmod u+x server_ctrl.



Usage:



 ./server_ctrl A2 start|stop





share|improve this answer























  • looks odd, is that a GNUism? I think the standard way to refer to the matched string is &. Also, you'll match A11 too when looking for A1.
    – ilkkachu
    Jul 5 at 11:52










  • Might be GNUish, but I saw in many implementations. For me & looks odd When I have 1 to 9 , why not ...
    – RoVo
    Jul 5 at 12:07















up vote
0
down vote













#!/bin/bash
server="$1"
case $2 in
start)
 sed -i "s/^#($server)$/1/" lserver.txt
 ;;
stop)
 sed -i "s/^$server$/#&/" lserver.txt
 ;;
esac


Save as server_ctrl, then run chmod u+x server_ctrl.



Usage:



 ./server_ctrl A2 start|stop





share|improve this answer























  • looks odd, is that a GNUism? I think the standard way to refer to the matched string is &. Also, you'll match A11 too when looking for A1.
    – ilkkachu
    Jul 5 at 11:52










  • Might be GNUish, but I saw in many implementations. For me & looks odd When I have 1 to 9 , why not ...
    – RoVo
    Jul 5 at 12:07













up vote
0
down vote










up vote
0
down vote









#!/bin/bash
server="$1"
case $2 in
start)
 sed -i "s/^#($server)$/1/" lserver.txt
 ;;
stop)
 sed -i "s/^$server$/#&/" lserver.txt
 ;;
esac


Save as server_ctrl, then run chmod u+x server_ctrl.



Usage:



 ./server_ctrl A2 start|stop





share|improve this answer















#!/bin/bash
server="$1"
case $2 in
start)
 sed -i "s/^#($server)$/1/" lserver.txt
 ;;
stop)
 sed -i "s/^$server$/#&/" lserver.txt
 ;;
esac


Save as server_ctrl, then run chmod u+x server_ctrl.



Usage:



 ./server_ctrl A2 start|stop






share|improve this answer















share|improve this answer



share|improve this answer








edited Jul 5 at 12:04


























answered Jul 5 at 11:36









RoVo

83219




83219











  • looks odd, is that a GNUism? I think the standard way to refer to the matched string is &. Also, you'll match A11 too when looking for A1.
    – ilkkachu
    Jul 5 at 11:52










  • Might be GNUish, but I saw in many implementations. For me & looks odd When I have 1 to 9 , why not ...
    – RoVo
    Jul 5 at 12:07

















  • looks odd, is that a GNUism? I think the standard way to refer to the matched string is &. Also, you'll match A11 too when looking for A1.
    – ilkkachu
    Jul 5 at 11:52










  • Might be GNUish, but I saw in many implementations. For me & looks odd When I have 1 to 9 , why not ...
    – RoVo
    Jul 5 at 12:07
















looks odd, is that a GNUism? I think the standard way to refer to the matched string is &. Also, you'll match A11 too when looking for A1.
– ilkkachu
Jul 5 at 11:52




looks odd, is that a GNUism? I think the standard way to refer to the matched string is &. Also, you'll match A11 too when looking for A1.
– ilkkachu
Jul 5 at 11:52












Might be GNUish, but I saw in many implementations. For me & looks odd When I have 1 to 9 , why not ...
– RoVo
Jul 5 at 12:07





Might be GNUish, but I saw in many implementations. For me & looks odd When I have 1 to 9 , why not ...
– RoVo
Jul 5 at 12:07













 

draft saved


draft discarded


























 


draft saved


draft discarded














StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f453585%2fshell-script-to-comment-and-uncomment-a-line-in-file%23new-answer', 'question_page');

);

Post as a guest
































































-

Popular posts from this blog

Peggy Mitchell

Image
EastEnders character This article is about the soap opera character. For the British tennis player, see Peggy Michell. For the author, see Margaret Mitchell. Peggy Mitchell Barbara Windsor as Peggy Mitchell (2008) EastEnders character Portrayed by Jo Warne (1991) Barbara Windsor (1994–2016) Duration 1991, 1994–2010, 2013–2016 First appearance Episode 650 30 April 1991  ( 1991-04-30 ) Last appearance Episode 5286 17 May 2016  ( 2016-05-17 ) (appearance) Episode 5287 19 May 2016 (voiceover) Introduced by Michael Ferguson (1991) Barbara Emile (1994) Louise Berridge (2004) Kate Harwood (2005) Lorraine Newman (2013) Dominic Treadwell-Collins (2014) Spin-off appearances The Mitchells - Naked Truths (1998) Classification Former; regular Profile Other names Peggy Butcher Occupation Barmaid Businesswoman Pub landlady Jo Warne as Peggy Mitchell (1991) Family Family Mitchell Father Jack Martin Mother Lily Martin Sisters Aunt ...
Read more

Palaiologos

Image
Palaiologos Παλαιολόγος Palaeologus, Palaeologue Imperial Family Double-headed eagle with the family cypher Country Byzantine Empire, Duchy of Montferrat (remaining lineage after Empire annexed by Ottomans) Founded 11th century  ( 11th century ) Founder Nikephoros Palaiologos (first known) Final ruler Constantine XI Palaiologos (Byzantine Empire) Margaret Paleologa (Montferrat) Titles Byzantine Emperor Marquess of Montferrat Style(s) "Augustus" "Basileus" "Autokrator" Traditions Greek Orthodoxy (predominantly) Roman Catholicism (remaining lineage in Montferrat) Dissolution 1533  ( 1533 ) Cadet branches Claimants: House of Kastrioti (defunct) House of Rurik (defunct) Palaiologan dynasty Chronology Michael VIII 1259–1282 with Andronikos II as co-emperor, 1261–1282 Andronikos II 1282–1328 with Michael IX (1294–1320) and Andronikos III (1321–1328) as co-emperors Andronikos III 1328–1341 John...
Read more

The Forum (Inglewood, California)

Image
The Forum "LA Forum" Prairie Ave. façade of The Forum in 2014 Full name The Forum, presented by Chase Former names The Forum (1967–1988) Great Western Forum (1988–2003) Address 3900 W. Manchester Blvd Location Inglewood, California Coordinates Coordinates: 33°57′29″N 118°20′31″W  /  33.95806°N 118.34194°W  / 33.95806; -118.34194 Public transit     Downtown Inglewood station Owner The Madison Square Garden Company Operator MSG Entertainment Seating type Reserved Capacity 17,500 Half-bowl: 8,000 Construction Broke ground July 1, 1966  ( 1966-07-01 ) Opened December 30, 1967  ( 1967-12-30 ) Renovated 1988, 2012–2014 Construction cost $16 million Renovation: 2014: $76.5 million Architect Charles Luckman Associates (original) Brisbin Brook Beynon (renovation) Structural engineer Johnson & Nielsen Associates (original) Severud Associates (renovation) Genera...
Read more